But I'm wondering whether it is wise to put more money down for lower interest rates or take a hit on interest rates and keep money in pocket?

Its a strategy that barely even worked few years ago but currently airbnb rents are DOWN across the board and LTR rents are UP, the trend changed last year due to so much airbnb supply it dropped the rates and airbnb also got stricter with cancellation fees as well as giving guest refunds more often. 

With rates over 8% for investment properties, it will be tough to cash flow without a creative strategy such as STR or rent by room. 

What are the vacancy rates, how long are houses sitting on the market.

But they are only one prong of the Internal Rate of Return. 

Besides NOI/Cap rate/LTV (70%) what else would lenders look for?

If a $100 increase in rent is feasible without risking losing your excellent tenant, it could improve the property's cash flow.Evaluate Loan Terms: Your adjustable-rate mortgage with a high interest rate is a significant consideration.

6.2% in "loan costs" and a 9.875% rate?

Plus you have to keep in mind that we are in a climate where interest rates are very likely to start trending downwards, maybe that's worth waiting a bit longer than you otherwise might to pay yourselves in dividends in the future.Surprising that only 20% of homes have a bathtub as I think of them as a necessity personally.

If he earns a 10% annual rate of return (compounded quarterly) in a portfolio created by a robo advisor, Investor A will need 22 years and seven months to become a millionaire.People gripe about negative cash flow but with this plan you probably can't touch it until 59 anyway.